As shown in the figure, the small wooden block with mass m slides onto the original stationary wooden board with mass m at speed v0. The horizontal ground is smooth, and the length of the wooden board is L. when the wooden block moves to the other end of the wooden board, their speeds are V1 and V2 respectively, and the displacement of the wooden board is l0. The internal energy generated in this process is calculated

As shown in the figure, the small wooden block with mass m slides onto the original stationary wooden board with mass m at speed v0. The horizontal ground is smooth, and the length of the wooden board is L. when the wooden block moves to the other end of the wooden board, their speeds are V1 and V2 respectively, and the displacement of the wooden board is l0. The internal energy generated in this process is calculated

According to the kinetic energy theorem, M: - μ Mg (L + l0) = 12mv & nbsp; 21-12mv & nbsp; 20 ① According to the kinetic energy theorem, M: μ mgl0 = 12mv & nbsp; 22 ② According to the law of conservation of energy, the reduction of mechanical energy of the system can be obtained